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<a name="1" href="#1">1</a>   <em class="jxr_javadoccomment">/**</em>
<a name="2" href="#2">2</a>   <em class="jxr_javadoccomment"> * Copyright (c) 2009 Cerner Corporation.</em>
<a name="3" href="#3">3</a>   <em class="jxr_javadoccomment"> * All rights reserved. This program and the accompanying materials</em>
<a name="4" href="#4">4</a>   <em class="jxr_javadoccomment"> * are made available under the terms of the Eclipse Public License v1.0</em>
<a name="5" href="#5">5</a>   <em class="jxr_javadoccomment"> * which accompanies this distribution, and is available at</em>
<a name="6" href="#6">6</a>   <em class="jxr_javadoccomment"> * <a href="http://www.eclipse.org/legal/epl-v10.html" target="alexandria_uri">http://www.eclipse.org/legal/epl-v10.html</a></em>
<a name="7" href="#7">7</a>   <em class="jxr_javadoccomment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_javadoccomment"> * Contributors:</em>
<a name="9" href="#9">9</a>   <em class="jxr_javadoccomment"> *    Cerner Corporation - initial API and implementation</em>
<a name="10" href="#10">10</a>  <em class="jxr_javadoccomment"> */</em>
<a name="11" href="#11">11</a>  <strong class="jxr_keyword">package</strong> com.cerner.system.<strong class="jxr_keyword">rest</strong>.jaas.cas;
<a name="12" href="#12">12</a>  
<a name="13" href="#13">13</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> java.net.URI;
<a name="15" href="#15">15</a>  <strong class="jxr_keyword">import</strong> java.net.URISyntaxException;
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">import</strong> java.util.List;
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.Map.Entry;
<a name="20" href="#20">20</a>  
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.Subject;
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.callback.Callback;
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.callback.CallbackHandler;
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.callback.NameCallback;
<a name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.callback.PasswordCallback;
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.callback.UnsupportedCallbackException;
<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> javax.security.auth.spi.LoginModule;
<a name="28" href="#28">28</a>  
<a name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.restlet.Client;
<a name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.restlet.Context;
<a name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.restlet.data.Parameter;
<a name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.restlet.data.Protocol;
<a name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.restlet.util.Series;
<a name="34" href="#34">34</a>  
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment">/**</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * JAAS {@link LoginModule} for the CAS 1.0 authentication protocol. The login</em>
<a name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * module reads the {@code javax.security.auth.login.name} or {@code</em>
<a name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * javax.security.auth.login.password} reads the shared state.</em>
<a name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * The CAS protocol uses HTTP(S) as the transport. The underlying HTTP client</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * BIO socket library can can be tweaked as part of the JAAS configuration:</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * &lt;table&gt;</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * &lt;th&gt;Parameter name&lt;/th&gt;</em>
<a name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * &lt;th&gt;Value type&lt;/th&gt;</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * &lt;th&gt;Default value&lt;/th&gt;</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * &lt;th&gt;Description&lt;/th&gt;</em>
<a name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.tcpNoDelay&lt;/td&gt;</em>
<a name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;boolean&lt;/td&gt;</em>
<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;false&lt;/td&gt;</em>
<a name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;Indicate if Nagle's TCP_NODELAY algorithm should be used.&lt;/td&gt;</em>
<a name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.keystorePath&lt;/td&gt;</em>
<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;${user.home}/.keystore&lt;/td&gt;</em>
<a name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL keystore path.&lt;/td&gt; &lt;/tr&gt;</em>
<a name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.keystorePassword&lt;/td&gt;</em>
<a name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;&lt;/td&gt;</em>
<a name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL keystore password.&lt;/td&gt;</em>
<a name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.keystoreType&lt;/td&gt;</em>
<a name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;JKS&lt;/td&gt;</em>
<a name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL keystore type&lt;/td&gt;</em>
<a name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.keyPassword&lt;/td&gt;</em>
<a name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;&lt;/td&gt;</em>
<a name="75" href="#75">75</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL key password.&lt;/td&gt;</em>
<a name="76" href="#76">76</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="77" href="#77">77</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="78" href="#78">78</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.certAlgorithm&lt;/td&gt;</em>
<a name="79" href="#79">79</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="80" href="#80">80</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SunX509&lt;/td&gt;</em>
<a name="81" href="#81">81</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL certificate algorithm.&lt;/td&gt;</em>
<a name="82" href="#82">82</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="83" href="#83">83</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="84" href="#84">84</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.secureRandomAlgorithm&lt;/td&gt;</em>
<a name="85" href="#85">85</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="86" href="#86">86</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;null (see java.security.SecureRandom)&lt;/td&gt;</em>
<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;Name of the RNG algorithm. (see java.security.SecureRandom class).&lt;/td&gt;</em>
<a name="88" href="#88">88</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="89" href="#89">89</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="90" href="#90">90</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.securityProvider&lt;/td&gt;</em>
<a name="91" href="#91">91</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="92" href="#92">92</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;null (see javax.net.ssl.SSLContext)&lt;/td&gt;</em>
<a name="93" href="#93">93</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;Java security provider name (see java.security.Provider class).&lt;/td&gt;</em>
<a name="94" href="#94">94</a>  <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="95" href="#95">95</a>  <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="96" href="#96">96</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.sslProtocol&lt;/td&gt;</em>
<a name="97" href="#97">97</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="98" href="#98">98</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;TLS&lt;/td&gt;</em>
<a name="99" href="#99">99</a>  <em class="jxr_javadoccomment"> * &lt;td&gt;SSL protocol.&lt;/td&gt;</em>
<a name="100" href="#100">100</a> <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="101" href="#101">101</a> <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="102" href="#102">102</a> <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.truststoreType&lt;/td&gt;</em>
<a name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="104" href="#104">104</a> <em class="jxr_javadoccomment"> * &lt;td&gt;null&lt;/td&gt;</em>
<a name="105" href="#105">105</a> <em class="jxr_javadoccomment"> * &lt;td&gt;Trust store type&lt;/td&gt;</em>
<a name="106" href="#106">106</a> <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="107" href="#107">107</a> <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="108" href="#108">108</a> <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.truststorePath&lt;/td&gt;</em>
<a name="109" href="#109">109</a> <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="110" href="#110">110</a> <em class="jxr_javadoccomment"> * &lt;td&gt;null&lt;/td&gt;</em>
<a name="111" href="#111">111</a> <em class="jxr_javadoccomment"> * &lt;td&gt;Path to trust store&lt;/td&gt;</em>
<a name="112" href="#112">112</a> <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="113" href="#113">113</a> <em class="jxr_javadoccomment"> * &lt;tr&gt;</em>
<a name="114" href="#114">114</a> <em class="jxr_javadoccomment"> * &lt;td&gt;http.client.truststorePassword&lt;/td&gt;</em>
<a name="115" href="#115">115</a> <em class="jxr_javadoccomment"> * &lt;td&gt;String&lt;/td&gt;</em>
<a name="116" href="#116">116</a> <em class="jxr_javadoccomment"> * &lt;td&gt;null&lt;/td&gt;</em>
<a name="117" href="#117">117</a> <em class="jxr_javadoccomment"> * &lt;td&gt;Trust store password&lt;/td&gt;</em>
<a name="118" href="#118">118</a> <em class="jxr_javadoccomment"> * &lt;/tr&gt;</em>
<a name="119" href="#119">119</a> <em class="jxr_javadoccomment"> * &lt;/table&gt;</em>
<a name="120" href="#120">120</a> <em class="jxr_javadoccomment"> * </em>
<a name="121" href="#121">121</a> <em class="jxr_javadoccomment"> * @author Alex Horn</em>
<a name="122" href="#122">122</a> <em class="jxr_javadoccomment"> * @since 1.0.0</em>
<a name="123" href="#123">123</a> <em class="jxr_javadoccomment"> */</em>
<a name="124" href="#124">124</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginModule.html">CasLoginModule</a> implements LoginModule {
<a name="125" href="#125">125</a> 
<a name="126" href="#126">126</a>   <em class="jxr_javadoccomment">/**</em>
<a name="127" href="#127">127</a> <em class="jxr_javadoccomment">   * Key for the username as stored in shared state.</em>
<a name="128" href="#128">128</a> <em class="jxr_javadoccomment">   */</em>
<a name="129" href="#129">129</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String USERNAME_KEY = <span class="jxr_string">"javax.security.auth.login.name"</span>;
<a name="130" href="#130">130</a> 
<a name="131" href="#131">131</a>   <em class="jxr_javadoccomment">/**</em>
<a name="132" href="#132">132</a> <em class="jxr_javadoccomment">   * Key for the password as stored in shared state.</em>
<a name="133" href="#133">133</a> <em class="jxr_javadoccomment">   */</em>
<a name="134" href="#134">134</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String PASSWORD_KEY = <span class="jxr_string">"javax.security.auth.login.password"</span>;
<a name="135" href="#135">135</a> 
<a name="136" href="#136">136</a>   <em class="jxr_javadoccomment">/**</em>
<a name="137" href="#137">137</a> <em class="jxr_javadoccomment">   * Prefix for JAAS configuration options that tweak the settings of the HTTP</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">   * client library.</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">   */</em>
<a name="140" href="#140">140</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String HTTP_CLIENT_KEY = <span class="jxr_string">"http.client."</span>;
<a name="141" href="#141">141</a> 
<a name="142" href="#142">142</a>   <em class="jxr_javadoccomment">/**</em>
<a name="143" href="#143">143</a> <em class="jxr_javadoccomment">   * Identifier for {@code casLoginUrl} JAAS configuration options.</em>
<a name="144" href="#144">144</a> <em class="jxr_javadoccomment">   */</em>
<a name="145" href="#145">145</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CAS_LOGIN_URL = <span class="jxr_string">"casLoginUrl"</span>;
<a name="146" href="#146">146</a> 
<a name="147" href="#147">147</a>   <em class="jxr_javadoccomment">/**</em>
<a name="148" href="#148">148</a> <em class="jxr_javadoccomment">   * Internal dependency on the module that is responsible for sending and</em>
<a name="149" href="#149">149</a> <em class="jxr_javadoccomment">   * receiving HTTP data.</em>
<a name="150" href="#150">150</a> <em class="jxr_javadoccomment">   */</em>
<a name="151" href="#151">151</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasCredentialConnector.html">CasCredentialConnector</a> casCredentialConnector;
<a name="152" href="#152">152</a> 
<a name="153" href="#153">153</a>   <em class="jxr_javadoccomment">/**</em>
<a name="154" href="#154">154</a> <em class="jxr_javadoccomment">   * Factory for {@link CasTicketConnector} objects.</em>
<a name="155" href="#155">155</a> <em class="jxr_javadoccomment">   */</em>
<a name="156" href="#156">156</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasTicketConnectorProvider.html">CasTicketConnectorProvider</a> casTicketConnectorProvider;
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>   <em class="jxr_javadoccomment">/**</em>
<a name="159" href="#159">159</a> <em class="jxr_javadoccomment">   * Construct a {@link CasLoginUrlCallback} at runtime if the {@code</em>
<a name="160" href="#160">160</a> <em class="jxr_javadoccomment">   * casLoginUrl} could not be discovered through the {@link #CAS_LOGIN_URL}</em>
<a name="161" href="#161">161</a> <em class="jxr_javadoccomment">   * JAAS configuration.</em>
<a name="162" href="#162">162</a> <em class="jxr_javadoccomment">   */</em>
<a name="163" href="#163">163</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CallbackProvider&lt;CasLoginUrlCallback&gt; casLoginUrlCallbackProvider;
<a name="164" href="#164">164</a> 
<a name="165" href="#165">165</a>   <em class="jxr_javadoccomment">/**</em>
<a name="166" href="#166">166</a> <em class="jxr_javadoccomment">   * Construct a {@link NameCallback} at runtime if the user name or password</em>
<a name="167" href="#167">167</a> <em class="jxr_javadoccomment">   * could not be discovered via shared variables.</em>
<a name="168" href="#168">168</a> <em class="jxr_javadoccomment">   */</em>
<a name="169" href="#169">169</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CallbackProvider&lt;NameCallback&gt; nameCallbackProvider;
<a name="170" href="#170">170</a> 
<a name="171" href="#171">171</a>   <em class="jxr_javadoccomment">/**</em>
<a name="172" href="#172">172</a> <em class="jxr_javadoccomment">   * Construct a {@link PasswordCallback} at runtime if the user name or</em>
<a name="173" href="#173">173</a> <em class="jxr_javadoccomment">   * password could not be discovered via shared variables.</em>
<a name="174" href="#174">174</a> <em class="jxr_javadoccomment">   */</em>
<a name="175" href="#175">175</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CallbackProvider&lt;PasswordCallback&gt; passwordCallbackProvider;
<a name="176" href="#176">176</a> 
<a name="177" href="#177">177</a>   <em class="jxr_javadoccomment">/**</em>
<a name="178" href="#178">178</a> <em class="jxr_javadoccomment">   * Allow configuration of the underlying HTTP client library.</em>
<a name="179" href="#179">179</a> <em class="jxr_javadoccomment">   */</em>
<a name="180" href="#180">180</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Client client;
<a name="181" href="#181">181</a> 
<a name="182" href="#182">182</a>   <em class="jxr_javadoccomment">/**</em>
<a name="183" href="#183">183</a> <em class="jxr_javadoccomment">   * The Subject to which credentials are attached. It is only set once with</em>
<a name="184" href="#184">184</a> <em class="jxr_javadoccomment">   * {@link #initialize(Subject, CallbackHandler, Map, Map)}. The</em>
<a name="185" href="#185">185</a> <em class="jxr_javadoccomment">   * {@link #casCredential} is added when invoking {@link #commit()}.</em>
<a name="186" href="#186">186</a> <em class="jxr_javadoccomment">   */</em>
<a name="187" href="#187">187</a>   <strong class="jxr_keyword">private</strong> Subject subject;
<a name="188" href="#188">188</a> 
<a name="189" href="#189">189</a>   <em class="jxr_javadoccomment">/**</em>
<a name="190" href="#190">190</a> <em class="jxr_javadoccomment">   * Callback handler to produce security information. It is only set once with</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">   * {@link #initialize(Subject, CallbackHandler, Map, Map)}.</em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">   */</em>
<a name="193" href="#193">193</a>   <strong class="jxr_keyword">private</strong> CallbackHandler callbackHandler;
<a name="194" href="#194">194</a> 
<a name="195" href="#195">195</a>   <em class="jxr_javadoccomment">/**</em>
<a name="196" href="#196">196</a> <em class="jxr_javadoccomment">   * JAAS shared state, as provided to the</em>
<a name="197" href="#197">197</a> <em class="jxr_javadoccomment">   * {@link #initialize(Subject, CallbackHandler, Map, Map)} method.</em>
<a name="198" href="#198">198</a> <em class="jxr_javadoccomment">   */</em>
<a name="199" href="#199">199</a>   <strong class="jxr_keyword">private</strong> Map&lt;String, ?&gt; sharedState;
<a name="200" href="#200">200</a> 
<a name="201" href="#201">201</a>   <em class="jxr_javadoccomment">/**</em>
<a name="202" href="#202">202</a> <em class="jxr_javadoccomment">   * Unmodifiable map that represents the JAAS configuration options. It is only</em>
<a name="203" href="#203">203</a> <em class="jxr_javadoccomment">   * set once with {@link #initialize(Subject, CallbackHandler, Map, Map)}.</em>
<a name="204" href="#204">204</a> <em class="jxr_javadoccomment">   */</em>
<a name="205" href="#205">205</a>   <strong class="jxr_keyword">private</strong> Map&lt;String, ?&gt; options;
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a>   <em class="jxr_javadoccomment">/**</em>
<a name="208" href="#208">208</a> <em class="jxr_javadoccomment">   * Instance field that is initially {@code null}. It is set if</em>
<a name="209" href="#209">209</a> <em class="jxr_javadoccomment">   * {@link #login()} successfully authenticates the user. An invocation of</em>
<a name="210" href="#210">210</a> <em class="jxr_javadoccomment">   * {@link #commit()} actually adds it to the {link {@link #subject}.</em>
<a name="211" href="#211">211</a> <em class="jxr_javadoccomment">   */</em>
<a name="212" href="#212">212</a>   <strong class="jxr_keyword">private</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasCredential.html">CasCredential</a> casCredential;
<a name="213" href="#213">213</a> 
<a name="214" href="#214">214</a>   <em class="jxr_javadoccomment">/**</em>
<a name="215" href="#215">215</a> <em class="jxr_javadoccomment">   * Internal constructor that allows for dependency injection.</em>
<a name="216" href="#216">216</a> <em class="jxr_javadoccomment">   */</em>
<a name="217" href="#217">217</a>   <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginModule.html">CasLoginModule</a>(Client client, <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasCredentialConnector.html">CasCredentialConnector</a> casLoginProducer,
<a name="218" href="#218">218</a>       <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasTicketConnectorProvider.html">CasTicketConnectorProvider</a> casTicketProducerProvider,
<a name="219" href="#219">219</a>       CallbackProvider&lt;CasLoginUrlCallback&gt; serviceUrlCallbackProvider,
<a name="220" href="#220">220</a>       CallbackProvider&lt;NameCallback&gt; nameCallbackProvider,
<a name="221" href="#221">221</a>       CallbackProvider&lt;PasswordCallback&gt; passwordCallbackProvider) {
<a name="222" href="#222">222</a> 
<a name="223" href="#223">223</a>     <strong class="jxr_keyword">this</strong>.client = client;
<a name="224" href="#224">224</a>     <strong class="jxr_keyword">this</strong>.casCredentialConnector = casLoginProducer;
<a name="225" href="#225">225</a>     <strong class="jxr_keyword">this</strong>.casTicketConnectorProvider = casTicketProducerProvider;
<a name="226" href="#226">226</a>     <strong class="jxr_keyword">this</strong>.casLoginUrlCallbackProvider = serviceUrlCallbackProvider;
<a name="227" href="#227">227</a>     <strong class="jxr_keyword">this</strong>.nameCallbackProvider = nameCallbackProvider;
<a name="228" href="#228">228</a>     <strong class="jxr_keyword">this</strong>.passwordCallbackProvider = passwordCallbackProvider;
<a name="229" href="#229">229</a>   }
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>   <em class="jxr_javadoccomment">/**</em>
<a name="232" href="#232">232</a> <em class="jxr_javadoccomment">   * Instantiate a new JAAS {@link LoginModule} that is able to authenticate</em>
<a name="233" href="#233">233</a> <em class="jxr_javadoccomment">   * users with the CAS 1.0 protocol.</em>
<a name="234" href="#234">234</a> <em class="jxr_javadoccomment">   */</em>
<a name="235" href="#235">235</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginModule.html">CasLoginModule</a>(<strong class="jxr_keyword">final</strong> Client client) {
<a name="236" href="#236">236</a>     <em class="jxr_comment">/*<em class="jxr_comment"> initialize HTTP transport layer components */</em></em>
<a name="237" href="#237">237</a>     <strong class="jxr_keyword">this</strong>.client = client;
<a name="238" href="#238">238</a>     <strong class="jxr_keyword">this</strong>.casCredentialConnector = <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasCredentialConnector.html">CasCredentialConnector</a>(client);
<a name="239" href="#239">239</a>     <strong class="jxr_keyword">this</strong>.casTicketConnectorProvider = <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasTicketConnectorProvider.html">CasTicketConnectorProvider</a>(client);
<a name="240" href="#240">240</a> 
<a name="241" href="#241">241</a>     <em class="jxr_comment">/*<em class="jxr_comment"> initialize JAAS Callback objects */</em></em>
<a name="242" href="#242">242</a>     <strong class="jxr_keyword">this</strong>.casLoginUrlCallbackProvider = provide(<strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginUrlCallback.html">CasLoginUrlCallback</a>(
<a name="243" href="#243">243</a>         <span class="jxr_string">"Service URI"</span>));
<a name="244" href="#244">244</a>     <strong class="jxr_keyword">this</strong>.nameCallbackProvider = provide(<strong class="jxr_keyword">new</strong> NameCallback(<span class="jxr_string">"Username"</span>));
<a name="245" href="#245">245</a>     <strong class="jxr_keyword">this</strong>.passwordCallbackProvider = provide(<strong class="jxr_keyword">new</strong> PasswordCallback(<span class="jxr_string">"Password"</span>,
<a name="246" href="#246">246</a>         false));
<a name="247" href="#247">247</a>   }
<a name="248" href="#248">248</a> 
<a name="249" href="#249">249</a>   <em class="jxr_javadoccomment">/**</em>
<a name="250" href="#250">250</a> <em class="jxr_javadoccomment">   * Instantiate a new JAAS {@link LoginModule} that is able to authenticate</em>
<a name="251" href="#251">251</a> <em class="jxr_javadoccomment">   * users with the CAS 1.0 protocol. This constructor will attempt to use the</em>
<a name="252" href="#252">252</a> <em class="jxr_javadoccomment">   * current thread-local Restlet context if it is not {@code null}. Otherwise</em>
<a name="253" href="#253">253</a> <em class="jxr_javadoccomment">   * it will create a pristine context.</em>
<a name="254" href="#254">254</a> <em class="jxr_javadoccomment">   */</em>
<a name="255" href="#255">255</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginModule.html">CasLoginModule</a>() {
<a name="256" href="#256">256</a>     <strong class="jxr_keyword">this</strong>(<strong class="jxr_keyword">new</strong> Client(Context.getCurrent() == <strong class="jxr_keyword">null</strong>
<a name="257" href="#257">257</a>         ? <strong class="jxr_keyword">new</strong> Context()
<a name="258" href="#258">258</a>           : Context.getCurrent(), Protocol.HTTPS));
<a name="259" href="#259">259</a>   }
<a name="260" href="#260">260</a> 
<a name="261" href="#261">261</a>   @SuppressWarnings( { <span class="jxr_string">"hiding"</span> <em class="jxr_comment">/*<em class="jxr_comment"> note "this" prefix */</em>})</em>
<a name="262" href="#262">262</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> initialize(Subject subject, CallbackHandler callbackHandler,
<a name="263" href="#263">263</a>       Map&lt;String, ?&gt; sharedState, Map&lt;String, ?&gt; options) {
<a name="264" href="#264">264</a>     <strong class="jxr_keyword">this</strong>.subject = subject;
<a name="265" href="#265">265</a>     <strong class="jxr_keyword">this</strong>.callbackHandler = callbackHandler;
<a name="266" href="#266">266</a>     <strong class="jxr_keyword">this</strong>.sharedState = sharedState;
<a name="267" href="#267">267</a>     <strong class="jxr_keyword">this</strong>.options = options;
<a name="268" href="#268">268</a> 
<a name="269" href="#269">269</a>     assert <strong class="jxr_keyword">this</strong>.subject != <strong class="jxr_keyword">null</strong>;
<a name="270" href="#270">270</a>     assert <strong class="jxr_keyword">this</strong>.sharedState != <strong class="jxr_keyword">null</strong>;
<a name="271" href="#271">271</a>     assert <strong class="jxr_keyword">this</strong>.options != <strong class="jxr_keyword">null</strong>;
<a name="272" href="#272">272</a> 
<a name="273" href="#273">273</a>     <strong class="jxr_keyword">final</strong> Context context = <strong class="jxr_keyword">this</strong>.client.getContext();
<a name="274" href="#274">274</a>     <strong class="jxr_keyword">if</strong> (context != <strong class="jxr_keyword">null</strong>) {
<a name="275" href="#275">275</a> 
<a name="276" href="#276">276</a>       <em class="jxr_comment">/*</em>
<a name="277" href="#277">277</a> <em class="jxr_comment">       * Copy all JAAS configuration settings that start with "http.client" to</em>
<a name="278" href="#278">278</a> <em class="jxr_comment">       * the Restlet context parameter list after stripping of the prefix.</em>
<a name="279" href="#279">279</a> <em class="jxr_comment">       */</em>
<a name="280" href="#280">280</a>       <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> keyOffset = HTTP_CLIENT_KEY.length();
<a name="281" href="#281">281</a>       <strong class="jxr_keyword">final</strong> Series&lt;Parameter&gt; parameters = context.getParameters();
<a name="282" href="#282">282</a>       <strong class="jxr_keyword">for</strong> (Entry&lt;String, ?&gt; option : <strong class="jxr_keyword">this</strong>.options.entrySet()) {
<a name="283" href="#283">283</a>         <strong class="jxr_keyword">if</strong> (option.getKey().startsWith(HTTP_CLIENT_KEY)) {
<a name="284" href="#284">284</a>           <strong class="jxr_keyword">final</strong> String httpClientKey = option.getKey().substring(keyOffset);
<a name="285" href="#285">285</a>           <strong class="jxr_keyword">final</strong> String httpClientValue = (String) option.getValue();
<a name="286" href="#286">286</a>           parameters.add(httpClientKey, httpClientValue);
<a name="287" href="#287">287</a>         }
<a name="288" href="#288">288</a>       }
<a name="289" href="#289">289</a>     }
<a name="290" href="#290">290</a>   }
<a name="291" href="#291">291</a> 
<a name="292" href="#292">292</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> login() <strong class="jxr_keyword">throws</strong> CasLoginException {
<a name="293" href="#293">293</a>     URI casLoginUrl = <strong class="jxr_keyword">null</strong>;
<a name="294" href="#294">294</a>     String username = <strong class="jxr_keyword">null</strong>;
<a name="295" href="#295">295</a>     <strong class="jxr_keyword">char</strong>[] password = <strong class="jxr_keyword">null</strong>;
<a name="296" href="#296">296</a> 
<a name="297" href="#297">297</a>     <em class="jxr_comment">/*<em class="jxr_comment"> Read JAAS configuration options to set casLoginUrl. */</em></em>
<a name="298" href="#298">298</a>     <strong class="jxr_keyword">final</strong> String rawCasLoginUrl = (String) <strong class="jxr_keyword">this</strong>.options.get(CAS_LOGIN_URL);
<a name="299" href="#299">299</a>     <strong class="jxr_keyword">if</strong> (rawCasLoginUrl != <strong class="jxr_keyword">null</strong>) {
<a name="300" href="#300">300</a>       <strong class="jxr_keyword">try</strong> {
<a name="301" href="#301">301</a>         casLoginUrl = <strong class="jxr_keyword">new</strong> URI(rawCasLoginUrl);
<a name="302" href="#302">302</a>       } <strong class="jxr_keyword">catch</strong> (URISyntaxException e) {
<a name="303" href="#303">303</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasFailedLoginException.html">CasFailedLoginException</a>(e);
<a name="304" href="#304">304</a>       }
<a name="305" href="#305">305</a>     }
<a name="306" href="#306">306</a> 
<a name="307" href="#307">307</a>     <em class="jxr_comment">/*<em class="jxr_comment"> Shared upstream state information has priority. */</em></em>
<a name="308" href="#308">308</a>     username = (String) <strong class="jxr_keyword">this</strong>.sharedState.get(USERNAME_KEY);
<a name="309" href="#309">309</a>     password = (<strong class="jxr_keyword">char</strong>[]) <strong class="jxr_keyword">this</strong>.sharedState.get(PASSWORD_KEY);
<a name="310" href="#310">310</a> 
<a name="311" href="#311">311</a>     <em class="jxr_comment">/*<em class="jxr_comment"> Fall back to discovery of missing information with CallbackHandler. */</em></em>
<a name="312" href="#312">312</a>     <strong class="jxr_keyword">if</strong> (casLoginUrl == <strong class="jxr_keyword">null</strong> || username == <strong class="jxr_keyword">null</strong> || password == <strong class="jxr_keyword">null</strong>) {
<a name="313" href="#313">313</a>       <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginUrlCallback.html">CasLoginUrlCallback</a> casLoginUrlCallback = <strong class="jxr_keyword">null</strong>;
<a name="314" href="#314">314</a> 
<a name="315" href="#315">315</a>       <strong class="jxr_keyword">final</strong> List&lt;Callback&gt; callbacks = <strong class="jxr_keyword">new</strong> ArrayList&lt;Callback&gt;(3 <em class="jxr_comment">/*<em class="jxr_comment"> three */</em>);</em>
<a name="316" href="#316">316</a>       <strong class="jxr_keyword">if</strong> (casLoginUrl == <strong class="jxr_keyword">null</strong>) {
<a name="317" href="#317">317</a>         casLoginUrlCallback = <strong class="jxr_keyword">this</strong>.casLoginUrlCallbackProvider.get();
<a name="318" href="#318">318</a>         callbacks.add(casLoginUrlCallback);
<a name="319" href="#319">319</a>       }
<a name="320" href="#320">320</a> 
<a name="321" href="#321">321</a>       NameCallback nameCallback = <strong class="jxr_keyword">null</strong>;
<a name="322" href="#322">322</a>       PasswordCallback passwordCallback = <strong class="jxr_keyword">null</strong>;
<a name="323" href="#323">323</a>       <strong class="jxr_keyword">if</strong> (username == <strong class="jxr_keyword">null</strong> || password == <strong class="jxr_keyword">null</strong>) {
<a name="324" href="#324">324</a>         nameCallback = <strong class="jxr_keyword">this</strong>.nameCallbackProvider.get();
<a name="325" href="#325">325</a>         passwordCallback = <strong class="jxr_keyword">this</strong>.passwordCallbackProvider.get();
<a name="326" href="#326">326</a> 
<a name="327" href="#327">327</a>         callbacks.add(passwordCallback);
<a name="328" href="#328">328</a>         callbacks.add(nameCallback);
<a name="329" href="#329">329</a>       }
<a name="330" href="#330">330</a> 
<a name="331" href="#331">331</a>       <strong class="jxr_keyword">if</strong> (!callbacks.isEmpty()) {
<a name="332" href="#332">332</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.callbackHandler == <strong class="jxr_keyword">null</strong>) {
<a name="333" href="#333">333</a>           <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasFailedLoginException.html">CasFailedLoginException</a>(
<a name="334" href="#334">334</a>               <span class="jxr_string">"Credentials or casLoginUrl need to be retrieved via CallbackHandler but none was specified"</span>);
<a name="335" href="#335">335</a>         } <strong class="jxr_keyword">else</strong> {
<a name="336" href="#336">336</a>           <strong class="jxr_keyword">try</strong> {
<a name="337" href="#337">337</a>             <strong class="jxr_keyword">this</strong>.callbackHandler.handle(callbacks.toArray(<strong class="jxr_keyword">new</strong> Callback[callbacks.size()]));
<a name="338" href="#338">338</a>           } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a name="339" href="#339">339</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasFailedLoginException.html">CasFailedLoginException</a>(e);
<a name="340" href="#340">340</a>           } <strong class="jxr_keyword">catch</strong> (UnsupportedCallbackException e) {
<a name="341" href="#341">341</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasFailedLoginException.html">CasFailedLoginException</a>(e);
<a name="342" href="#342">342</a>           }
<a name="343" href="#343">343</a> 
<a name="344" href="#344">344</a>           <strong class="jxr_keyword">if</strong> (casLoginUrl == <strong class="jxr_keyword">null</strong>) {
<a name="345" href="#345">345</a>             assert casLoginUrlCallback != <strong class="jxr_keyword">null</strong>;
<a name="346" href="#346">346</a> 
<a name="347" href="#347">347</a>             casLoginUrl = casLoginUrlCallback.getCasLoginUrl();
<a name="348" href="#348">348</a>           }
<a name="349" href="#349">349</a> 
<a name="350" href="#350">350</a>           <strong class="jxr_keyword">if</strong> (username == <strong class="jxr_keyword">null</strong> || password == <strong class="jxr_keyword">null</strong>) {
<a name="351" href="#351">351</a>             assert nameCallback != <strong class="jxr_keyword">null</strong>;
<a name="352" href="#352">352</a>             assert passwordCallback != <strong class="jxr_keyword">null</strong>;
<a name="353" href="#353">353</a> 
<a name="354" href="#354">354</a>             username = nameCallback.getName();
<a name="355" href="#355">355</a>             password = passwordCallback.getPassword();
<a name="356" href="#356">356</a>             passwordCallback.clearPassword();
<a name="357" href="#357">357</a>           }
<a name="358" href="#358">358</a>         }
<a name="359" href="#359">359</a>       }
<a name="360" href="#360">360</a>     }
<a name="361" href="#361">361</a> 
<a name="362" href="#362">362</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> isCasLoginUrlNull = casLoginUrl == <strong class="jxr_keyword">null</strong>;
<a name="363" href="#363">363</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> isUsernameNull = username == <strong class="jxr_keyword">null</strong>;
<a name="364" href="#364">364</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> isPasswordNull = password == <strong class="jxr_keyword">null</strong>;
<a name="365" href="#365">365</a> 
<a name="366" href="#366">366</a>     <strong class="jxr_keyword">if</strong> (isCasLoginUrlNull || isUsernameNull || isPasswordNull) {
<a name="367" href="#367">367</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginPrepareException.html">CasLoginPrepareException</a>(isCasLoginUrlNull, isUsernameNull,
<a name="368" href="#368">368</a>           isPasswordNull);
<a name="369" href="#369">369</a>     } <strong class="jxr_keyword">else</strong> {
<a name="370" href="#370">370</a>       <strong class="jxr_keyword">final</strong> String casTicketGrantingTicket;
<a name="371" href="#371">371</a>       <strong class="jxr_keyword">try</strong> {
<a name="372" href="#372">372</a>         casTicketGrantingTicket = <strong class="jxr_keyword">this</strong>.casCredentialConnector.login(
<a name="373" href="#373">373</a>             casLoginUrl, username, password);
<a name="374" href="#374">374</a>       } <strong class="jxr_keyword">catch</strong> (CasConnectorException e) {
<a name="375" href="#375">375</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginException.html">CasLoginException</a>(e);
<a name="376" href="#376">376</a>       } <strong class="jxr_keyword">catch</strong> (CasConnectorFault e) {
<a name="377" href="#377">377</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasLoginException.html">CasLoginException</a>(e);
<a name="378" href="#378">378</a>       }
<a name="379" href="#379">379</a>       <strong class="jxr_keyword">final</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasTicketConnector.html">CasTicketConnector</a> casTicketSender = <strong class="jxr_keyword">this</strong>.casTicketConnectorProvider.get(
<a name="380" href="#380">380</a>           casLoginUrl, casTicketGrantingTicket);
<a name="381" href="#381">381</a> 
<a name="382" href="#382">382</a>       <strong class="jxr_keyword">this</strong>.casCredential = <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasCredential.html">CasCredential</a>(casTicketSender, username,
<a name="383" href="#383">383</a>           password);
<a name="384" href="#384">384</a> 
<a name="385" href="#385">385</a>       <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a name="386" href="#386">386</a>     }
<a name="387" href="#387">387</a>   }
<a name="388" href="#388">388</a> 
<a name="389" href="#389">389</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> commit() <strong class="jxr_keyword">throws</strong> CasFailedLoginException {
<a name="390" href="#390">390</a>     <strong class="jxr_keyword">if</strong> (!isLoggedIn()) {
<a name="391" href="#391">391</a>       <strong class="jxr_keyword">return</strong> false;
<a name="392" href="#392">392</a>     } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.subject.isReadOnly()) {
<a name="393" href="#393">393</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../com/cerner/system/rest/jaas/cas/CasFailedLoginException.html">CasFailedLoginException</a>(<span class="jxr_string">"Subject is read only"</span>);
<a name="394" href="#394">394</a>     } <strong class="jxr_keyword">else</strong> {
<a name="395" href="#395">395</a>       <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.subject.getPrivateCredentials().add(<strong class="jxr_keyword">this</strong>.casCredential);
<a name="396" href="#396">396</a>     }
<a name="397" href="#397">397</a>   }
<a name="398" href="#398">398</a> 
<a name="399" href="#399">399</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> abort() {
<a name="400" href="#400">400</a>     <strong class="jxr_keyword">if</strong> (!isLoggedIn()) {
<a name="401" href="#401">401</a>       <strong class="jxr_keyword">return</strong> false;
<a name="402" href="#402">402</a>     } <strong class="jxr_keyword">else</strong> {
<a name="403" href="#403">403</a> 
<a name="404" href="#404">404</a>       <em class="jxr_comment">/*</em>
<a name="405" href="#405">405</a> <em class="jxr_comment">       * Delegate to logout to clean the subject and destroy credentials. This</em>
<a name="406" href="#406">406</a> <em class="jxr_comment">       * is needed because the overall login can be aborted after we've</em>
<a name="407" href="#407">407</a> <em class="jxr_comment">       * committed to the Subject.</em>
<a name="408" href="#408">408</a> <em class="jxr_comment">       */</em>
<a name="409" href="#409">409</a>       <strong class="jxr_keyword">return</strong> logout();
<a name="410" href="#410">410</a>     }
<a name="411" href="#411">411</a>   }
<a name="412" href="#412">412</a> 
<a name="413" href="#413">413</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> logout() {
<a name="414" href="#414">414</a>     <strong class="jxr_keyword">if</strong> (!isLoggedIn()) {
<a name="415" href="#415">415</a>       <strong class="jxr_keyword">return</strong> false;
<a name="416" href="#416">416</a>     } <strong class="jxr_keyword">else</strong> {
<a name="417" href="#417">417</a>       <strong class="jxr_keyword">try</strong> {
<a name="418" href="#418">418</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.subject.isReadOnly()) {
<a name="419" href="#419">419</a>           <strong class="jxr_keyword">return</strong> false;
<a name="420" href="#420">420</a>         } <strong class="jxr_keyword">else</strong> {
<a name="421" href="#421">421</a>           <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.subject.getPrivateCredentials().remove(<strong class="jxr_keyword">this</strong>.casCredential);
<a name="422" href="#422">422</a>         }
<a name="423" href="#423">423</a>       } <strong class="jxr_keyword">finally</strong> {
<a name="424" href="#424">424</a>         <strong class="jxr_keyword">this</strong>.casCredential = <strong class="jxr_keyword">null</strong>;
<a name="425" href="#425">425</a>       }
<a name="426" href="#426">426</a>     }
<a name="427" href="#427">427</a>   }
<a name="428" href="#428">428</a> 
<a name="429" href="#429">429</a>   <em class="jxr_javadoccomment">/**</em>
<a name="430" href="#430">430</a> <em class="jxr_javadoccomment">   * Indicates whether or not the login module is currently logged in.</em>
<a name="431" href="#431">431</a> <em class="jxr_javadoccomment">   * </em>
<a name="432" href="#432">432</a> <em class="jxr_javadoccomment">   * @return a boolean {@code true} if logged in, otherwise {@code false}</em>
<a name="433" href="#433">433</a> <em class="jxr_javadoccomment">   */</em>
<a name="434" href="#434">434</a>   <strong class="jxr_keyword">boolean</strong> isLoggedIn() {
<a name="435" href="#435">435</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.casCredential != <strong class="jxr_keyword">null</strong>;
<a name="436" href="#436">436</a>   }
<a name="437" href="#437">437</a> 
<a name="438" href="#438">438</a>   <em class="jxr_javadoccomment">/**</em>
<a name="439" href="#439">439</a> <em class="jxr_javadoccomment">   * Internal API to instantiate a {@link CallbackProvider} that produces a</em>
<a name="440" href="#440">440</a> <em class="jxr_javadoccomment">   * singleton JAAS {@link Callback} object.</em>
<a name="441" href="#441">441</a> <em class="jxr_javadoccomment">   */</em>
<a name="442" href="#442">442</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> &lt;T <strong class="jxr_keyword">extends</strong> javax.security.auth.callback.Callback&gt; CallbackProvider&lt;T&gt; provide(
<a name="443" href="#443">443</a>       <strong class="jxr_keyword">final</strong> T callback) {
<a name="444" href="#444">444</a> 
<a name="445" href="#445">445</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> CallbackProvider&lt;T&gt;() {
<a name="446" href="#446">446</a> 
<a name="447" href="#447">447</a>       <strong class="jxr_keyword">public</strong> T get() {
<a name="448" href="#448">448</a>         <strong class="jxr_keyword">return</strong> callback;
<a name="449" href="#449">449</a>       }
<a name="450" href="#450">450</a> 
<a name="451" href="#451">451</a>     };
<a name="452" href="#452">452</a>   }
<a name="453" href="#453">453</a> }
</pre>
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